Lateral-motion driving box



' A'. C. BUNKER.

LATERAL MOTION DRIVING BOX.

APPLICATION FILED MAY 18, I922.

' 41 9 Patented Oct. 10,1922.

3 SHEETS-SHEET I.

WITNESSES A. C. BUNKER.

LATERAL MOTION DRIVING BOX.

APPLICATION FILED MAY 18, [922- IITNES 5 5 m wi n LATERAL MOTION DRLVING BOX. APPLICATION FILED MAY 8, 192 2.

A. C. BUNKER." v i Patented Oct. W, 19252.;

3 SHEETS-SHEET 3.

ll atented Unfit, 'lll, i922.

ARTHUR C. BUNKER, OF SCHENECTADY, NEW YORK.

LATER L-Morrow nnivine Box.

Application filed May 18, 1922, Serial No. 561,887.

Myinvention relates to means for affording yielding lateral motion between the journal bearing and the frame of a railroad vehicle, and is particularly adapted for the driving boxes of locomotives.

In the design of locomotives of the ten-j coupled and eight-coupled types, it has been found desirable to shorten the rigid wheel base by providing for lateral play of the front or the rear driving axles, or for both.

Heretofore this lateral motionhas been obtained by the use of lengthened bearings, with heavy saddles and cross j okes, and wearing plates, bolted to the frames, but

this construction can only be used when the springs are placed abovethef driving boxes.

The object of my invention is to provide a simple construction, in which thelateral motion feature is embodied in the driving box itself, which may be fitted in the usual position in a locomotive frame pedestal, without change of the axle bearingor spring rigging, thereby eliminating the additional weight, cost, and complication of overhead continuous saddles. V a 1 The improvement claimed is hereinafter fullyset forth a In. the accompanying drawings: Figure 1 is a side View, in elevation, of a locomotive, illustrating myilnproved driving boxes applied to the first and fourth axles; Fig. 2, a side view, half in elevation and half'in sec tion, of a lateral motion driving box, enrbodying my invention, as applied in position in a locomotive frame pedestal; Fig. 3,

a transverse view of the same, partly in elevation and partly in section; and, Figs. 4 and 5, views, in perspective, of the outer and inner members or sections, respectively, of my improved driving box.

In the practice of my invention, referring descriptively to the specific embodiment thereof which is herein exemplified, the driving box is formed in. two sections, an inner section, carrying the usual brass for fitting on the bearing on the axle, and an outer sec- F tion, adapted to fit over said inner section and bear on the usual wedge and shoe 111 the frame pedestahthe two sections having a relatlve lateral movement and being separated, vertically, by a suitably centering device which exerts a yielding resistance to said lateralmovement and tends to return said parts to the normal central position.

The inner section of the driving box, 6,

is. of the usual arch form having side walls, 6, and end flanges 6 the arch portion carrying the brass, 7, for the bearing on the axle, 9-. The outer section, 8, of the driving box, which is shown in detail in Fig. 4, is

of a corresponding inverted U sh ape, having side walls,8 adapted to fit over the side walls, 6, of the inner section, and end flanges, 8 provided with seats, 8, for the spring saddles, 10, or equalizers, 11.

The distance between the flanges, 6", (3", of the inner section, is greater than that be tween the outside faces of the flanges, 8 8", of the outer section, to provide for the'relative lateral play, as clearly shown in Fig. 25,"

and the outer face of the flange, 6 of the inner section abuts against the hub of the driving wheel, 15, and moves therewith in its lateral movements, while the outer section, 8, cooperates with the usual wedge, 19, and shoe, 18, between its vertical flanges, 8 8", in the pedestahl, of the locomotive frame, 1 I W i The outer section, 8, of the driving box, fits down over the innersection, 6, as shown in the assembledposition, Figs. 2 and 3, but does not bear directly upon it, being vertically separated therefrom by a centering device, such as the three-point rockers, 12, one at each side of the box, and substantially in a vertical plane with the respective side walls, 6, (3, of the innersection, said rockers having hardened seats, 18 and 1st, inserted in suitable cavities in the respective members, Sand 6. It will be obvious that other forms of centering devices, havingoppositely xfacing seats, located substantially in the same vertical plane, may be used in lieu of the three-point rockers. The centering device should also be disposed symmetrically with reference to a transverse plane central between the opposite ends of the journal bearing.

Inasmuch as it is desirable that the, driving boxes at the opposite ends of the same axle should be displaced simultaneously, in the lateral movement, a light flexible spacing yoke, 16, is provided, said yoke connecting of the inner box sections, 6. This will allow the two boxes to adjust themselves vertically in their pedestals, independently of each other.

The inner box section normally occupies the central position, as indicated in Fig. 3, but when excessive lateral pressure is exerted by the hub of the driving wheel, 15, against the face of the flange, 6 of the inner section, 6, the latter is shifted laterally in the outer box section, 8, thus tilting the rockers, 12, on their seats. In this manner, the action of gravity exerted, through the tilting rockers, or centering device, opposes a yielding resistance to the lateral thrust of the wheel hubs, and tends to return the parts to the normal central position.

I claim as my invention and desire to secure by Letters Patent 1. In a lateral motion driving box, the combination of inner and outer box sections, capable of relative lateral movement; and means for exerting a yielding resistance to said lateral movement from the normal cen tral position.

2. In a lateral motion driving box, the combination of inner and outer box sections, capable of relative lateral movement; and a centering device, located vertically between said sections, for. separating and controlling the same.

3. In a lateral motion driving box, the

combination of inner and outer box sections,

capable of relative lateral movement; and centering means, located at both sides of the centre, and vertically between said inner and outer sections.

4. In a lateral motion driving box, the combination of inner and outer box sections, capable of relative lateral movement; and a centering device, disposed symmetrically front and back of the journal bearing, and vertically between the inner and outer sections.

5. In a lateral motion driving box, the combination of inner and outer box sections, capable of? relative lateral movement; and said sections having seats in vertical alignment; and centering means between said seats. I

6. In a lateral motion driving box, the eombmatlon of lnner and outer box sectlons,

capable of relative lateral movement; and

a pair of centering rockers, supporting the outer section upon the inner section.

7. In a lateral motion driving box, the combination of an inner arch shaped box section, with side walls; an outer U-shapcd box section, fitted over said inner section; said sections being capable of relative lateral movement; and a centering device, supporting the outer section upon the inner section.

8. In a lateral motion driving box, the combination of an outer box section, having vertical flanges adapted to engage the pedestal jaws; an inner box section, embraced by the outer section, and having a -apacity of relative late 'al movement; and a centering device, supporting the outer section upon the inner section.

9. In a lateral motion driving box, the combination of an outer box section, capable of vertical movement in a locomotive l raine pedestal; an inner box section, laterally movable within the outer section, and provided with wearing 'l'aces adapted to abut against a wheel hub; and a centering device between said sections.

10. In a lateral motion driving box, the combination of an inner box section, having a journal bearing; an outer box section embracing said inner section, and provided with saddle seats, said sections being capable of relative longitudinal movement; and a centering device between said sections.

ll. In a lateral motion driving box, the combination of an inner box section, having a journal bearing, and a vertical llange adapted to bear against a wheel hub; an outer box section fitted over said inner section, and having vertical flanges provided with saddle seats,said sections being capable of relative lateral movement; and a centering device between said sections.

12. In a lateral motion driving box, the combination of. outer and inner box sections, capable. of relative longitudinal movement; a centering device betwi-ien said sections; and a spacing yoke, adapted to connect the inner sections of the boxes at the opposite ends of a driving axle.

ARTHUR C. BUNKER.

Witnesses:

C. W. Tonn, J. HOWARD Waaaa. 

